摘要
依托福州某地铁车站深基坑工程,利用ABAQUS有限元软件建立2D计算模型,考虑基坑降水开挖全过程数值模拟,分析了开挖过程土体深层位移、地表沉降以及内支撑轴力变化的规律,并与实测值进行了对比分析。结果表明:随着基坑开挖,深层土体位移呈现"弓型"变化趋势,当基坑开挖至坑底时,土体位移达到最大;地表最大沉降位于基坑边缘处,距基坑侧壁越远沉降值越小;支撑轴力呈波浪线变化。数值模拟结果与监测数据变化规律基本一致,并且均满足设计控制值的要求。
Based on the deep foundation pit project of a subway station in Fuzhou,a 2D calculation model was established using ABAQUS finite element software.The numerical simulation of the entire process of foundation pit dewatering and excavation were considered.The laws of deep soil displacement,surface settlement,and changes in internal support axial force during the excavation process were analyzed,and compared with the measured values.The results Indicate that with the foundation pit is excavated,the displacement of the deep soil shows a'bow shaped'trend,and the soil displacement reaches its maximum when the foundation pit is excavated to the bottom of the pit;The maximum surface settlement is located at the edge of the foundation pit,and the further away from the side wall of the foundation pit,the smaller the settlement value;The supporting axial force varies in a wavy pattern.The numerical simulation results are basically consist-ent with the changes in monitoring data,and both meet the requirements of design control values.
出处
《福建建设科技》
2025年第1期81-84,共4页
Fujian Construction Science & Technology
关键词
基坑工程
基坑降水
数值模拟
自动化监测
foundation pit
foundation pit dewatering
numerical simulation
automatic monitoring
